BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > e90 wont start, brand new battery
The BMW 7 Series key fob uses the CR2032 battery like most other car models. The CR2032 battery is a lithium-oxide battery that is coin or button-shaped. It has a diameter of 20mm and a thickness of 3.2 mm. It has a voltage of 3.0 volts. It is a primary non-rechargeable battery that has a typical weight of 3.0 grams.
This is easy tutorial for changing E9X Key Fob Battery in under 1 minute. COMFORT ACCESS models only!Get the CR2032 battery here for BMW's with Comfort Acces
4249 posts · Joined 2005. #2 · Jun 10, 2018. locked out. Probably dead battery - Try your key to unlock/open the trunk - gain access to the battery and temporarily connect 12VDC to the terminals to supply power so you can unlock your doors. My opinions are free - you'll get exactly what you pay for!
Yes, the CA battery is a CR2032, same battery you would use in a desktop PC motherboard. You pop the key out the back of your fob and use a dime and twist in the thin slot below the key hole, it pops a small cover off the bottom/back of the fob, that is your CA battery.
My 2018 330e aux battery also needs replacing: Max eDrive not possible due to a "system request". My local BMW dealer does have the battery, which is nice, but they want $520 plus install $. The same VARTA battery is available for 72 Euro from spareto.com in Europe, I elected to get the BOSCH for 81USD.
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bmw e91 key battery replacement
